312111321233 has 2 divisors, whose sum is σ = 312111321234. Its totient is φ = 312111321232.

The previous prime is 312111321191. The next prime is 312111321251. The reversal of 312111321233 is 332123111213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227387829904 + 84723491329 = 476852^2 + 291073^2 .

It is a cyclic number.

It is not a de Polignac number, because 312111321233 - 2²⁴ = 312094544017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312111321199 and 312111321208.

It is not a weakly prime, because it can be changed into another prime (312111321133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156055660616 + 156055660617.

It is an arithmetic number, because the mean of its divisors is an integer number (156055660617).

Almost surely, 2^312111321233 is an apocalyptic number.

It is an amenable number.

312111321233 is a deficient number, since it is larger than the sum of its proper divisors (1).

312111321233 is an equidigital number, since it uses as much as digits as its factorization.

312111321233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

Adding to 312111321233 its reverse (332123111213), we get a palindrome (644234432446).

The spelling of 312111321233 in words is "three hundred twelve billion, one hundred eleven million, three hundred twenty-one thousand, two hundred thirty-three".